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集中度是水文、气象学的常用统计量。近年来,被逐渐应用于分析疾病的季节性。传染病的季节性分布是其流行病学重要发展特征之一,各个国家各个地区有所不同。分析传染病的季节性变化规律,对制定有效的防治措施有很大的参考价值。本文运用集中度对桦甸市1990～1997年6种法定传染病的发病时间进行分析,结果如下。1 材料与方法1.1 资料来源 桦甸市卫生防疫站《急性传染病月、年报表》。1.2 统计方法 先用上述资料计算各种疾病月发病数与其全年发病总数之比,然后按下列公公式计算集中度M。
Concentration is a common statistic of hydrology and meteorology. In recent years, it is gradually applied to analyze seasonal diseases. The seasonal distribution of infectious diseases is one of its important epidemiological characteristics of development, all regions of each country is different. Analysis of seasonal changes in infectious diseases, the development of effective prevention and control measures have great reference value. In this paper, the incidence of six legal infectious diseases in Huadian City from 1990 to 1997 was analyzed by using concentration degree. The results are as follows. 1 Materials and Methods 1.1 Source Huadian City Health and Epidemic Prevention Station “acute infectious disease month, annual report.” 1.2 Statistical Methods Use the above information to calculate the monthly incidence of various diseases and their annual total incidence ratio, and then calculate the concentration M according to the following formula.